Overpredict means to forecast or estimate in excess of the actual outcome. Synonyms for overpredict include overestimate, overshoot, exaggerate, misjudge, miscalculate, and overvalue. These words all describe the act of predicting or estimating something to a greater degree than is warranted, leading to inaccurate or unrealistic results. Overestimation implies an excessive evaluation of something's worth or importance, while overshot suggests going beyond a target or goal. Exaggeration and misjudgment refer to making rash assumptions or generalizations, whereas miscalculation and overvaluation suggest errors in calculation or judgment. Using any of these synonyms for overpredict can help to convey a more specific nuance or emphasis in your writing.